Boiler pipe expansion device suitable for narrow and small space

Abstract

The invention relates to a boiler pipe expansion device suitable for a narrow and small space. A boiler comprises a smoke pipe, a front boiler pipe plate and a small smoke chamber pipe plate, wherein the front boiler pipe plate and the small smoke chamber pipe plate are arranged at the two ends of the smoke pipe. The boiler pipe expansion device comprises a pipe expansion machine, a pipe expander and a connection rod. The pipe expansion machine is connected with the pipe expander through the connection rod. The connection rod and the pipe expander penetrate through the smoke pipe. The pipe expander is aligned at the connecting position of the small smoke chamber pipe plate and the smoke pipe. The pipe expansion machine transmits power to the pipe expander through the connection rod to enable the small smoke chamber pipe plate and the smoke pipe to be connected in an expansion mode. A mandrel is sleeved with a plurality of pin rollers with the rotation direction opposite to that of the mandrel. Compared with the prior art, the boiler pipe expansion device has the advantages that the wide space of the front boiler pipe plate is utilized, cost is reduced, and the device is suitable for the narrow and small space.

Description

technical field [0001] The invention relates to a tube expansion device, in particular to a boiler tube expansion device suitable for narrow spaces. Background technique [0002] There are two ways to connect the tube plate of the industrial oil-fired gas boiler and the tube on the heating surface: welding and expansion. The expansion joint method is still widely used in fuel gas boilers such as WNS due to its characteristics of easy replacement and low stress. [0003] Tube expanders generally have electric, hydraulic and manual forms, and the manual mode is suitable for repairs and other occasions where the workload of tube expansion is small. In the boiler manufacturing process, it is generally driven by electric and hydraulic means. Compared with hydraulic drive, the cost of equipment is relatively high, and electric tube expanders are more commonly used in factories. The structure of WNS wet-back boiler generally has a small smoke chamber, and the space of the small ...

AI Technical Summary

Problems solved by technology

The structure of the tube expander is relatively simple, and the setting from the 1 / 4 of the expander to the 1 / 2 of the expander can play a role in preheating the enlarged part, but the tube expander cannot be flexibly driven, and its application range is limited. narrow

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